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https://github.com/hombit/linear-search
https://github.com/hombit/linear-search
Last synced: 24 days ago
JSON representation
- Host: GitHub
- URL: https://github.com/hombit/linear-search
- Owner: hombit
- Created: 2023-12-05T14:16:10.000Z (about 1 year ago)
- Default Branch: master
- Last Pushed: 2023-12-15T13:10:17.000Z (about 1 year ago)
- Last Synced: 2024-10-28T12:09:45.821Z (2 months ago)
- Language: Python
- Size: 11.7 KB
- Stars: 0
- Watchers: 2
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
# Linear search in Python
## Multiple implementations of linear search in Python
Implemented in:
- `./python/` — pure Python implementation
- `./cython/` — Cython implementation
- `./numba/` — Numba implementation
- `./rust/` — Rust implementation, includes "unsafe" version with no bound checks, which gives ≲1% of performance boost
### Benchmark results
Prepare environment and install packages:
```bash
# Create virtual environment
python3 -mvenv venv
source venv/bin/activate
python --m pip install pytest-benchmark
# Install packages
python -m pip install -e ./cython
python -m pip install -e ./numba
python -m pip install -e ./python
python -m pip install -e ./rust
```
Run benchmark:
```bash
python -m pytest --benchmark-columns=mean,stddev --benchmark-sort=mean
```
Results on Macbook M2Pro:
```
--------------------------- benchmark 'n1 = 0, n2 = 0': 5 tests ----------------------------
Name (time in ns) Mean StdDev
--------------------------------------------------------------------------------------------
test_random[0-0-linear_search_rust_noboundscheck] 339.6194 (1.0) 108.8312 (3.49)
test_random[0-0-linear_search_numba] 390.5817 (1.15) 178.5697 (5.72)
test_random[0-0-np_searchsorted] 526.2229 (1.55) 48.2097 (1.55)
test_random[0-0-linear_search_pure] 587.2055 (1.73) 31.2013 (1.0)
test_random[0-0-linear_search_cython] 814.8187 (2.40) 148.5344 (4.76)
--------------------------------------------------------------------------------------------
--------------------------- benchmark 'n1 = 0, n2 = 1': 5 tests ----------------------------
Name (time in ns) Mean StdDev
--------------------------------------------------------------------------------------------
test_random[1-0-linear_search_rust_noboundscheck] 360.7630 (1.0) 106.0214 (2.39)
test_random[1-0-linear_search_numba] 404.8671 (1.12) 229.9952 (5.18)
test_random[1-0-np_searchsorted] 528.0389 (1.46) 51.9852 (1.17)
test_random[1-0-linear_search_pure] 604.6312 (1.68) 44.3989 (1.0)
test_random[1-0-linear_search_cython] 821.7900 (2.28) 237.7039 (5.35)
--------------------------------------------------------------------------------------------
----------------------------- benchmark 'n1 = 0, n2 = 1000': 5 tests ----------------------------
Name (time in ns) Mean StdDev
-------------------------------------------------------------------------------------------------
test_random[1000-0-linear_search_rust_noboundscheck] 496.4859 (1.0) 168.1557 (3.60)
test_random[1000-0-linear_search_numba] 549.5571 (1.11) 260.7167 (5.59)
test_random[1000-0-linear_search_pure] 808.0275 (1.63) 46.6623 (1.0)
test_random[1000-0-linear_search_cython] 1,059.6019 (2.13) 315.8147 (6.77)
test_random[1000-0-np_searchsorted] 1,839.4599 (3.70) 221.9672 (4.76)
-------------------------------------------------------------------------------------------------
---------------------------- benchmark 'n1 = 0, n2 = 1000000': 5 tests ----------------------------
Name (time in us) Mean StdDev
---------------------------------------------------------------------------------------------------
test_random[1000000-0-linear_search_rust_noboundscheck] 451.3591 (1.0) 81.0664 (1.0)
test_random[1000000-0-linear_search_numba] 514.6513 (1.14) 82.6470 (1.02)
test_random[1000000-0-linear_search_pure] 524.0535 (1.16) 88.3341 (1.09)
test_random[1000000-0-linear_search_cython] 533.6643 (1.18) 96.6155 (1.19)
test_random[1000000-0-np_searchsorted] 1,657.2208 (3.67) 85.4011 (1.05)
---------------------------------------------------------------------------------------------------
--------------------------- benchmark 'n1 = 1, n2 = 0': 5 tests ----------------------------
Name (time in ns) Mean StdDev
--------------------------------------------------------------------------------------------
test_random[0-1-linear_search_rust_noboundscheck] 343.8103 (1.0) 127.5148 (3.52)
test_random[0-1-linear_search_numba] 401.9221 (1.17) 205.2635 (5.67)
test_random[0-1-np_searchsorted] 526.6139 (1.53) 49.0353 (1.35)
test_random[0-1-linear_search_pure] 615.8211 (1.79) 36.2017 (1.0)
test_random[0-1-linear_search_cython] 816.5837 (2.38) 215.6150 (5.96)
--------------------------------------------------------------------------------------------
--------------------------- benchmark 'n1 = 1, n2 = 1': 5 tests ----------------------------
Name (time in ns) Mean StdDev
--------------------------------------------------------------------------------------------
test_random[1-1-linear_search_rust_noboundscheck] 362.3157 (1.0) 33.1371 (1.0)
test_random[1-1-linear_search_numba] 416.7252 (1.15) 205.3709 (6.20)
test_random[1-1-np_searchsorted] 530.6849 (1.46) 46.4057 (1.40)
test_random[1-1-linear_search_cython] 834.0820 (2.30) 209.3378 (6.32)
test_random[1-1-linear_search_pure] 836.1345 (2.31) 93.0276 (2.81)
--------------------------------------------------------------------------------------------
------------------------------- benchmark 'n1 = 1, n2 = 1000': 5 tests ------------------------------
Name (time in ns) Mean StdDev
-----------------------------------------------------------------------------------------------------
test_random[1000-1-linear_search_rust_noboundscheck] 774.5616 (1.0) 259.6886 (1.0)
test_random[1000-1-linear_search_numba] 1,196.9010 (1.55) 432.5245 (1.67)
test_random[1000-1-linear_search_cython] 2,277.8249 (2.94) 377.8110 (1.45)
test_random[1000-1-np_searchsorted] 2,888.2325 (3.73) 275.3711 (1.06)
test_random[1000-1-linear_search_pure] 110,729.3463 (142.96) 3,124.3429 (12.03)
-----------------------------------------------------------------------------------------------------
------------------------------ benchmark 'n1 = 1, n2 = 1000000': 5 tests -------------------------------
Name (time in us) Mean StdDev
--------------------------------------------------------------------------------------------------------
test_random[1000000-1-linear_search_rust_noboundscheck] 855.9420 (1.0) 91.8085 (1.39)
test_random[1000000-1-linear_search_numba] 1,244.8770 (1.45) 114.6359 (1.74)
test_random[1000000-1-linear_search_cython] 1,742.7948 (2.04) 238.8857 (3.63)
test_random[1000000-1-np_searchsorted] 2,653.8976 (3.10) 65.8866 (1.0)
test_random[1000000-1-linear_search_pure] 110,977.0751 (129.65) 1,563.5847 (23.73)
--------------------------------------------------------------------------------------------------------
---------------------------- benchmark 'n1 = 1000, n2 = 0': 5 tests ---------------------------
Name (time in ns) Mean StdDev
-----------------------------------------------------------------------------------------------
test_random[0-1000-linear_search_rust_noboundscheck] 345.5767 (1.0) 137.9347 (3.33)
test_random[0-1000-linear_search_numba] 401.0349 (1.16) 262.9576 (6.36)
test_random[0-1000-np_searchsorted] 527.8698 (1.53) 57.7568 (1.40)
test_random[0-1000-linear_search_pure] 614.6859 (1.78) 41.3778 (1.0)
test_random[0-1000-linear_search_cython] 821.3021 (2.38) 291.1268 (7.04)
-----------------------------------------------------------------------------------------------
------------------------------- benchmark 'n1 = 1000, n2 = 1': 5 tests ------------------------------
Name (time in ns) Mean StdDev
-----------------------------------------------------------------------------------------------------
test_random[1-1000-np_searchsorted] 566.5439 (1.0) 59.8944 (1.0)
test_random[1-1000-linear_search_rust_noboundscheck] 866.9993 (1.53) 246.9589 (4.12)
test_random[1-1000-linear_search_numba] 1,033.3153 (1.82) 259.3776 (4.33)
test_random[1-1000-linear_search_cython] 3,966.8451 (7.00) 417.0161 (6.96)
test_random[1-1000-linear_search_pure] 105,571.0441 (186.34) 3,211.9783 (53.63)
-----------------------------------------------------------------------------------------------------
-------------------------- benchmark 'n1 = 1000, n2 = 1000': 5 tests ---------------------------
Name (time in us) Mean StdDev
------------------------------------------------------------------------------------------------
test_random[1000-1000-linear_search_numba] 1.8918 (1.0) 0.3651 (2.28)
test_random[1000-1000-linear_search_rust_noboundscheck] 1.9414 (1.03) 0.1601 (1.0)
test_random[1000-1000-linear_search_cython] 10.1248 (5.35) 0.7542 (4.71)
test_random[1000-1000-np_searchsorted] 58.7142 (31.04) 1.9418 (12.13)
test_random[1000-1000-linear_search_pure] 306.1571 (161.83) 5.9321 (37.06)
------------------------------------------------------------------------------------------------
------------------------------ benchmark 'n1 = 1000, n2 = 1000000': 5 tests -----------------------------
Name (time in us) Mean StdDev
---------------------------------------------------------------------------------------------------------
test_random[1000000-1000-linear_search_rust_noboundscheck] 868.1418 (1.0) 74.8734 (1.06)
test_random[1000000-1000-linear_search_numba] 1,361.3032 (1.57) 105.9985 (1.50)
test_random[1000000-1000-linear_search_cython] 2,012.2270 (2.32) 70.8773 (1.0)
test_random[1000000-1000-np_searchsorted] 59,703.6301 (68.77) 309.4617 (4.37)
test_random[1000000-1000-linear_search_pure] 143,736.0657 (165.57) 848.2648 (11.97)
---------------------------------------------------------------------------------------------------------
--------------------------- benchmark 'n1 = 1000000, n2 = 0': 5 tests ----------------------------
Name (time in ns) Mean StdDev
--------------------------------------------------------------------------------------------------
test_random[0-1000000-linear_search_rust_noboundscheck] 343.1752 (1.0) 182.6622 (4.69)
test_random[0-1000000-linear_search_numba] 399.7146 (1.16) 223.1381 (5.73)
test_random[0-1000000-np_searchsorted] 526.4312 (1.53) 52.6773 (1.35)
test_random[0-1000000-linear_search_pure] 605.4443 (1.76) 38.9137 (1.0)
test_random[0-1000000-linear_search_cython] 818.7875 (2.39) 264.7867 (6.80)
--------------------------------------------------------------------------------------------------
--------------------------------- benchmark 'n1 = 1000000, n2 = 1': 5 tests ----------------------------------
Name (time in ns) Mean StdDev
--------------------------------------------------------------------------------------------------------------
test_random[1-1000000-np_searchsorted] 635.4328 (1.0) 48.9943 (1.0)
test_random[1-1000000-linear_search_rust_noboundscheck] 491,383.6285 (773.31) 13,564.8762 (276.87)
test_random[1-1000000-linear_search_numba] 613,702.3999 (965.80) 77,155.0027 (>1000.0)
test_random[1-1000000-linear_search_cython] 3,191,825.2086 (>1000.0) 29,114.8299 (594.25)
test_random[1-1000000-linear_search_pure] 107,599,883.5848 (>1000.0) 405,733.7120 (>1000.0)
--------------------------------------------------------------------------------------------------------------
------------------------------ benchmark 'n1 = 1000000, n2 = 1000': 5 tests -----------------------------
Name (time in us) Mean StdDev
---------------------------------------------------------------------------------------------------------
test_random[1000-1000000-np_searchsorted] 188.8775 (1.0) 9.2289 (1.0)
test_random[1000-1000000-linear_search_rust_noboundscheck] 590.7254 (3.13) 10.4048 (1.13)
test_random[1000-1000000-linear_search_numba] 816.5589 (4.32) 84.5074 (9.16)
test_random[1000-1000000-linear_search_cython] 3,828.4083 (20.27) 41.0707 (4.45)
test_random[1000-1000000-linear_search_pure] 144,789.2441 (766.58) 972.6912 (105.40)
---------------------------------------------------------------------------------------------------------
-------------------------- benchmark 'n1 = 1000000, n2 = 1000000': 5 tests ---------------------------
Name (time in ms) Mean StdDev
------------------------------------------------------------------------------------------------------
test_random[1000000-1000000-linear_search_rust_noboundscheck] 9.1368 (1.0) 0.1166 (1.17)
test_random[1000000-1000000-linear_search_numba] 10.4603 (1.14) 0.3167 (3.19)
test_random[1000000-1000000-linear_search_cython] 13.7457 (1.50) 0.0993 (1.0)
test_random[1000000-1000000-np_searchsorted] 123.1651 (13.48) 0.3161 (3.18)
test_random[1000000-1000000-linear_search_pure] 306.1097 (33.50) 0.7911 (7.96)
------------------------------------------------------------------------------------------------------
```